| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a composition that can primarily be used in dental composite to afford low curing shrinkage and low curing stress, and to provide a method of producing the same. <P>SOLUTION: A composition contains a polymerizable cyclic oligomer having at least one (meth)acrylate as a polymerizable group. The method of producing the composition includes producing the polymerizable cyclic oligomer via a condensation reaction of: a reactive and free radical polymerizable precursor (A) containing at least one (meth)acrylate; a coupling agent or an activated coupling agent (B), containing a primary diol, a secondary amine, and a diacid; and a reactive and free radical polymerizable precursor. <P>COPYRIGHT: (C)2013,JPO&INPIT |
